| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To supply power to a respective power supply equipment while keeping the output voltage at a constant voltage, even when the supply capacity of the supply is exhausted, in parallel operation by the a plurality of power equipment. <P>SOLUTION: The plurality of units 4, 4 of... electric equipment for supplying DC current to a DC equipment 102 by parallel operation, is constituted of one unit of a first power source equipment 4 and a plurality of second power sources 4b-4d. The first electric power equipment 4a uses a DC voltage to be in constant voltage regardless of the magnitude of the output current. The second power voltage is simply supplied variable voltage mode where the output voltage becomes smaller when going the output current larger, and a constant voltage mode where the output voltage is constant regardless of the magnitude of the output current, and when the stoppage of commercial power source AC is detected, the mode is changed from the variable voltage mode into the constant voltage mode, and when the recovery of the commercial power source AC is detected, the mode is changed from the constant voltage mode into the variable voltage mode. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
